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The November 7, 1923 earthquake

M5.7near Progreso, Mexico, California

A magnitude 5.7 earthquake, 36.2 miles off San Diego County. The 138th strongest in California’s record since 1900, and the strongest within 50 miles since a magnitude 5.9 on June 22, 1915.

The earthquake

Magnitude
5.7
as reported (uk)
Depth
—
Not recorded
Local time
Wednesday, November 7, 1923
15:57 PST; 23:57 UTC
Epicentre
32.50°N, 115.50°W
36.2 mi from San Diego County
In California’s record
138th
strongest of 97,065 since 1900
Within 50 miles
3
counties; more on this date

USGS ANSS Comprehensive Earthquake Catalog, event ushis697 (“11 km SE of Progreso, Mexico”). The USGS event page carries the ShakeMap, felt reports and the official summary.

Counties and cities within 50 miles

Distance from the epicentre to each county boundary (zero when inside) and to each city centre.

Counties

Cities, largest first

Earthquakes around the epicentre

4,266 earthquakes of magnitude 3 or more within 50 miles of this epicentre since 1973.

Earthquakes of magnitude 3 or more within 50 miles of the epicentre, by year 1973: 30 1974: 26 1975: 73 1976: 101 1977: 56 1978: 44 1979: 285 1980: 51 1981: 37 1982: 14 1983: 31 1984: 19 1985: 20 1986: 43 1987: 250 1988: 61 1989: 70 1990: 35 1991: 31 1992: 26 1993: 54 1994: 19 1995: 13 1996: 15 1997: 31 1998: 31 1999: 67 2000: 65 2001: 21 2002: 91 2003: 26 2004: 31 2005: 74 2006: 82 2007: 35 2008: 122 2009: 93 2010: 1,349 1,349 2011: 102 2012: 122 2013: 50 2014: 24 2015: 24 2016: 40 2017: 23 2018: 23 2019: 20 2020: 93 2021: 83 2022: 20 2023: 38 2024: 61 2025: 21 19731978198319881993199820032008201320182023

Earlier earthquakes of magnitude 5 or more within 50 miles, strongest first

USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.